氮素穗肥施用期对一季籼粳杂交稻氮肥效率、产量和品质的影响

乐丽红, 刘凯丽, 陈忠平, 王斌强, 唐舟, 程飞虎, 张昆

Effects of Application Time of N Fertilizer at Panicle Differentiation Stage on the Nitrogen Use Efficiencies, Yield and Quality of One-Season Indica-Japonica Hybrid Rice

Le Lihong, Liu Kaili, Chen Zhongping, Wang Binqiang, Tang Zhou, Cheng Feihu, Zhang Kun

表4 氮素穗肥施用期对氮肥利用效率的影响

Table 4 Effects of applying time of panicle fertilizer on nitrogen use efficiency

处理 Treatment 施氮量 N application amount (kg/hm2) 氮肥农学利用率 Nitrogen agronomic efficiency (kg/kg) 氮肥偏生产力 Partial productivity of nitrogen fertilizer (kg/kg) 2019 2020 2019 2020 抽穗前35d 35 days before heading 255 13.45ab 15.07c 45.37ab 47.34c 抽穗前28d 28 days before heading 255 14.90ab 16.83b 46.82ab 49.11b 抽穗前21d 21 days before heading 255 16.51ab 18.74a 48.43ab 51.01a 抽穗前14d 14 days before heading 255 18.59a 18.42a 50.51a 50.70a 抽穗前7d Seven days before heading 255 13.45ab 15.34c 45.37ab 47.61c 抽穗期Heading period 255 12.43b 14.43c 44.35b 46.71c 抽穗后7d Seven days after heading 255 12.16b 14.49c 44.08b 46.76c 抽穗后14d 14 days after heading 255 14.20ab 13.31d 46.12ab 45.59d CK（不施肥） CK (no fertilizer) 0 － － － －